In this monograph, technical jargon is avoided and a variation is described from the common approaches to evaluation that emphasize experimental design and pretesting and post-testing. In this variation the emphasis is upon the processes and procedures of the bilingual programs in Illinois and information is obtained by visiting teams, hence the author's reference to "on-site evaluation." Each team had a cross-section of administrators and teachers from other schools, community members, and personnel from colleges and universities. There are three purposes intended by the on-site evaluations: first, provide immediate feedback to the project staff; second, provide a learning experience for team members; and, third, provide the State Office of Education with information on the strengths and weaknesses of bilingual projects. The three purposes are described and the results of aggregating the information involved in the third purpose are summarized. (Author/GK)